For small projects the current notification system is sufficent. But I think for bigger projects it should be more dynamically. I want to define for every single project, and not global, whether I should receive an email if someone changes a wiki page or something else.

If user x edit a wikipage in projectA maybe it is not important for me and I don't want a notification. But if user x edit a wikipage in ProjectB maybe it's necessary that I will receive a notification.